Effect of dedicated mechanical subcooler size and gas cooler pressure control on transcritical CO2 booster systems

• Mechanical subcooling increases the COP of CO 2 systems at high outdoor temperature. The gas cooler pressure plants can be reduced with degree. Optimum degree and optimum cooling capacity subcooler are found. Dedicated Subcooling (DMS) is one most investigated effective strategies applied to increase performance commercial refrigeration in transcritical operation. Further benefits obtained by a reduction main cycle conditions. In this work important parameters for design operation such system, i.e. DMS capacity, pressure, considered their effect on annual energy use plant estimated warm hot climate conditions means validated model. also compared parallel compression scheme performed through water chiller dedicated HVAC. results solution among those investigated, choice best operating allows further saving cost reduction.